Ammonite is the name of one of the 'high explosives,' which comprise also Ardeer powder, bellite, carbonite, robrinite, and securite. See BLASTING, DYNAMITE, EXPLOSIVES, GUN-COTTON, NITRO-GLYCERINE, PICRIC ACID.
Ammonite
Chambers's Encyclopaedia, Volume 1: A to Beaufort, p. 231
Source scan(s): p. 0250